Ratchet-drill



W. H. RICHARDS. Ratchet Drill.

No'. 231,361. Patemed Aug. 17, 1880.

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UNITED STATES PATENT OFFICE.

WILLIAM H. RICHARD-S, OF PITTSBURG, PENNSYLVANIA.

RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 231,361, dated August 1'7, 1880. Application filed November 25, 1879.

To all whom it may concern.-

Be it known that I, WILLIAM H. RIcHARDs, of the city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Ratchet-Drills, of which the following is a specification.

The invention relates to drills for metal, the motion of which is communicated by vibrating a hand-lever.

The nature of my invention consists in the construction and arrangement of the parts of a ratchet-drill, and also its application as a stationary hand drill-press, as will be more fully set forth.

The object of my invention is to make the tool stronger, more compact, and avoid the clogging' by dust, Svc., and the disarran gement of parts, and at the same time secure as nearly uniform motion as possible.

In order that others may be enabled to make and use my invention, I will now describe its construction and operation, referring to the drawings connected herewith, in which- Figure l presents a side view or elevation. Fig. 2 is a View of the spindle, showing internal working parts, and is partly in section. Fig. 3 is an end View of one of the coveringsleeves.

Like letters of reference refer to like parts in all these figures.

The illustration here given is that of a stationary hand drill-press; but by removing its supports and supplying a temper-feed, it can be used as the ordinary ratchet-drill is, as more fully set `forth in the patent dated December 4, 1877, and numbered 197 ,896, granted to me, upon which the improvements herein set forth have been made.

A is the shaft or spindle passing through the center of the standard E, and having at the lower end the head provided with the socket 0 for the reception ofthe drill. A is also pierced by two oblong holes, c', through which the key-pins b b pass, securing thereby the movable ratchets C C. These holes c must allow so much` play to the keys b b as will permit the ratchets to press toward the center E the spiral springs F F, and thus disengage themselves from their mates on the hubs of the bevel-pinions B B, as they alternately require to do.

The crab-teeth ot' the two sets of ratchets are inclined in opposite directions, so the vibrating motion ofthe lever R, attached to the main wheel K, acting through the ratchets on the pinions B B, causes an almost continuous rotary motion of A.

The lower pinion B rests upon the shoulder of the socket-head, and the other parts follow in their respective positions above it, all allowing a free revolution of the spindle, the two ratchets C (l, secured by the key-pins b b', passing through the oblong holes c', conveying the motion to A. These parts are all covered by the two sleeves H H, one en d of which rests on the center standard, E, and the other end abuts against the inner surface of the pinions B B, thus forming a complete covering for the small working parts, preventing clogging by dust, making itimpossible for the pinions to get out of gear, and retaining the spiral springs F F in the best position for work. Besides adding greatly to the strength, they give a finish to the machine.

Ihe sleeves are provided with oil-holes d d', for lubricating the internal parts.

The whole arrangementis held in place by the collar G, secured by the set-screw a.

The main wheel K moves freely 011 the stud on one side of E.

On the top of the spindle is the balancewheel J, intended to be of such weight that it will, by its impetus, when in motion, overcome the slight dead-point caused by the vibratory motion of K, and thus give a continuous motion to the drill.

The key-pins b b are riveted tight in the ratchets G C, but work freely in the oblong holes c.

The whole machine is attached by supports L L L and bolts N N N, or their equivalents, to the post P.

The vibrating of the lever R causes the pinions B B to revolve in opposite directions alternately, one working upon the spindle A while the lever is going down, and the other when it is going up, the springs and ratchets alternately relieving themselves as the motion is reversed, while the balance-wheel equalizes the motion.

The miter-wheelM is shown hereon as illustrating the means by which a continuous rotary motion maybe conveyed from this to other IOO H, and supports L, all constructed and armaehines, such as meat-choppers, feed-cub ranged substantially as and for the purposes 1o l ters, 85o.

Having thus fully described my invention, herein set forth. what I claim is 5 The combination oi' the spindle A, having VILLIAM HY' RICHARDS' oblong holes c', and provided with the bal- Witnesses: ance-wheel J, the ratchets C, with pins b', the DAVID L. SMITH, springs F,ee11ter E, collar G, covering-sleeves I). S. MCKNIGHT.

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